Automatic and adjustable burette and funnel holder



May 25 1926.

w. s. AVERY AUTOMATIC AND ADJUSTABLE BURET'IE AND FUNNEL HOLDER Filed August 31, 1923 3 nmmtoz Patented May 25, 1923.

WALTER SANFORD AVERY, on KNOXVILLE, TENNESSEE.

AUTOMATIC AND ADJUSTABLE BUEETTE AND FUNNEL HOLDER.

Application filed August 31, 1923. Serial No. 660,381.

My invention relates to improvements in burette and funnel holders, or clamps, ap plied to the ordinary stand now used for such apparatus.

The main object of my invention, is to provide a device of this type, which is formed of a single length of spring wire, so bent upon itself as to form an adjustable spring clamp that will automatically and securely. engage a vertical shaft, 'et can easily be instantly released, by pressure of thumb and finger, when desiring to change its position on the shaft; then, by further bending of the two ends of said-spring wire, form automatic holders for 'burettes and funnels, that exposes the readings thereon throughout full length.

A further object is to provide a rigid holder that will be strong and durable in use, and a time saver, because of freedom from set-screws.

A still further object is to provide a holder that is simple and practical, in construction, and comparatively cheap to'manufacture.

With these, and further objects, in view, the invention consists in certain novel features of construction, and combinations and arrangements of parts, as will be fully hereinafter described and pointed out in the claims.

In the accompanying drawings Figure l is a perspective view, in front elevation of my improved burette and funnel holder in use.

Fig. 2 is a sectional view on line 22 of Figure 1.

Fig. 3 is a sectional view on the dotted line 3-3 of Figure 1. i

Fig. 4 is a perspective front elevation of my improved holder, in locked position, as designed for a single burette.

Fig. 5 is a perspective view in released, or unlocked, position, of the device shown in Figure 4. 1

Fig. 6 is a'sketch of a modified form of the burette clamping end of my device shown in Figures 1 and 4-.

Similar numbers refer to similar parts throughout the several views.

the dotted Referring in detail to Figures 1, 2 and 3,

of spring wire, bent upon itself, to form an expansible and contractible loop.

The central portion of the wire may be bent, one or more times, spirally around a cylinder, to form an eXpa-nsible spring receiving 0011 member 1, of a diameter slightly less than the vertical standard S, to which it" 1s to be applied so that when expanded and themselves, but each toward the other, forming loop members 2, 2, the planes of which are in alignment with the diameter of the cylinder.

Atomeeting points with member 1, the ends of the wire are then bent backward, at opposite but equal angles,- and in the same plane, which must be at right angles to the gizgmeter of the cylinder, forming members Referring in detail to Fig. 1,the dotted lines represent the apparatus with which my improved device is to be used; I being the base, and S being the vertical standard;

Now press together members 2, 2, together to open coil spring member 1, and slip same on standard S, where, when released, it automatically, and securely clamps itself. See

particularly that members 3, 3 are in perfect alignment with each other, along a line touching the circumference of standard S,

and at right angles thereto.

The ends of the wire are then bent backward, in same lane, and around to about four fifths circl es, in parallelism with the base S, 1, to form opposite companion funnel holding members l, 4, with equal angles, and ends in perfect alignment, as extensions of members 3, 3. i

The ends of the wire are then bent differently, to produce slightly different forms of clamping members for burettes B, B, but still retaining the predominant characteristics of the clasps.

The end of the wire to the left is bent forward in the plane of members l, 1, and curved toward member 1, to form the curved retaining member 5, for burette, then bent backward in same plane and reverse curve, to a point slightly to the right of member 5, forming member 6, the two form ng retaining linger. The end of the wire 18 then bent vertically, at right angle to planes of members 4, and 5, and in same vertical plane as members 3, 3 forming member 9.

The end of the wire is then bent forward horizontally, and at right angles to members 9, and 3, then backward on itself, fornnng loop member 10, the plane of the loop being at right angle to the plane of members 4, 4:, thus forming another retaining finger.

The end of the wire is then bent upward, in alignment, as an extension of member 9.

The end of the wire is then bent forward and back, in reverse order to members 5, 6, and in parallelisnii therewith, to form their companion members 11, 12.

The burette B, (represented by dotted lines), being forced against curved members 5, and 12, by pressure of spring member 10, is automatically and firmly held.

The end of the wire is then bent, at right angle to member 9, in vertical plane with 9 and 8, 3, forming member 15.

The clamped burette B, being now held in parallelism and alignment with stand ard S, the end of the wire is bent backward around standard S, to form clamping loop 16, its plane being at right angle to standard S. V

The wire is then bent backward at 25, in plane of member 16, then curved forward in same plane, and over 15, until loop mem ber 16 rigidly clamps shaft S, when the end is again bent downward and looped backward to hold it there. 7

Referring again to the end of the wire, to the right of standard S, where we left it, after forming extension of member 3, the end of the wire is then bent backward and to the right, to form curved loop 1%, in same plane as members 4, 4, then bent upward, at 13, to form companion members 9 and 10 to same numbered members at left of standard S, with parallel planes and alignment.

The wire is then bent, at 13, to form companion member to 14 below, and in parallel plane and vertical alignment.

The Wire is then bent backward, in same plane, forming member 15, in perfect alignment with the member 15 to left of standard lVith burettes B, B, in place, and in parallelism with shaft S, the wire is then bent around standard S, in the plane of the companion loop member 16, but in the opposite direction.

The wire is then further bent to form opposite companion members to 171819, at the left of standard S.

Referring in detail to Fig. 1, of drawings, a singleburette holder is formed of a single piece of spring wire bent to right angles, at points 21-21, forming vertical member 9.

The ends of the wire are then bent backward to form companion curved shoulder members 2222, in parallel planes, perpendicular to member 9.

The wire is then bent forward at the ends of the curved shoulders in the same planes and to equal angles, forming the members 1515 in parallelism and alignment.

At equidistant points from the curved shoulder members 2:2422, the member 15 is then bent forward, in the same planes, and around to form loop members 16, 16 to receive the standard 8, and which loop members l6-16, shall ri idly clamp the standard S, when members 17-18, 17-18, are formed, as in Figure 1.

The ends of the wire are then extended from members 1818 in alignment with members 15-15, to a point even with member 9, where they are bent backward to form loops 30-30, in planes at right angles to member 9, thus completing the opposing engaging members 3131.

When a burette is forced between member 9 and members 3030, it is rigidly held in upright position, yet can be instantly, and easily, removed for cleaning.

The modification shown in Fig. 6 is formed by simply making horizontal figure eights, in members 15 extending to member 9 spring loops 33 33 engaging and holding the burette securely, in vertical position.

I may make my holders in combination, or separate, and for use with any number of burettes or funnels, as desired.

The operation of all forms of my device will be readily understood, and it should be noted that any of them are easily applied to and detached from any suitable standard or supporting rod. The burettes need only to be gently forced between spring receiving members, or therefrom, there being no set screws to loosen or wear out, and the burette readings are at no time hidden but are always in plain view.

While my coil spring clamp is designed, primarily, for use with burette and funnel holders, it will be apparent that it can also be employed to support any light shelf, or cross arm, where change of position is frequently desirable.

In the combination holder, shown in Fig. 1, the members 16, 16 are left in unlocked position, (see Fig. 2, dotted lines) when using as funnel holder only; the device can then be easily raised, or lowered, by pressing together members 22.

Various other slight changes may be made in the general form and arrangement of parts described, without deviating from the invention, and hence I do not limit myself to the precise details set forth, but consider myself at liberty to make such changes and alterations as fairly fall within the spirit and scope of the appended claims.

Having thus fully described my invention what I claim as new and desire to secure by Letters Patent is:

1. A clamp as herein characterized comprising a single piece of wire bent upon itself to form upper and lower expansible loops adapted to resiliently and adjustably engage a supporting standard said wire eX- tending laterally from said loops to form upper and lower arms, said arms having a portion bent in a horizontal plane to define expansible loops adapted to receive and clamp cylindrical articles, said upper and lower arms connected at their outer ends by an uprightly disposed bar.

2. A clamp as herein characterized, comprising a single piece of wire bent to form a vertical end bar and upper and lower horizontal arms extending inwardly from said end bar, said arms bent adjacent said end bar in a horizontal plane to form loops adapted to receive and clamp cylindrical articles, and the inner ends of said arms bent in horizontal planes to form expansible loops adapted to resiliently and adjustably engage a supporting standard.

3. A clamp as herein characterized, comprising a single piece or" Wire bent to lorm a vertical endconnecting bar and upper and lower horizontal arms extending inwardly from said end bar, said arms bent and offset laterally in a horizontal plane to form loops adapted to receive and hold cylindrical articles, the inner ends of said arms bent upon themselves in horizontal planes to form expansible loops adapted to resiliently and adjustably engage a supporting standard, and thence extending outwardly and bent, and extending outwardly along one side of the arms and extended across the loops at the outer ends of the arms.

WALTER SANFORD AVERY. 

